Rankers Physics
Topic: Laws of Motion
Subtopic: Definition of Force Inertia and First Law

Generally it is said "Normal reaction always acts perpendicular to the surface of contact" :
The statement is always correct
The statement is some times correct
The statement is correct
I can not comment, the way you have designed the question made me speech less.

Solution:

Normal reaction force is always normal ( Perpendicular ) to the surface.  

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